Snow guard



FIG. 1 is a top front perspective view of a snow guard showing our new design;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a left side elevational view thereof, the side opposite being a mirror image of the side shown;

FIG. 4 is a top plan view thereof; and,

FIG. 5 is a bottom plan view thereof. 

The ornamental design for a snow guard, as shown and described. 